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Chocolate Mousse Fudge Cake

A single layer of dense chocolate cake topped with a cloudlike mousse and finished with glossy ganache, perfect for indulgent celebrations.
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Prep Time 30 minutes
Cook Time 35 minutes
Total Time 2 hours
Servings: 8 servings
Course: Dessert
Cuisine: American
Calories: 450
Ingredients Method Notes

Ingredients
  

For the Cake
  • 1 cup all-purpose flour
  • 1/2 cup unsweetened cocoa powder
  • 1 teaspoon baking soda
  • 1/2 teaspoon salt
  • 1 cup granulated sugar
  • 1/2 cup brown sugar
  • 2 large eggs
  • 1/2 cup buttermilk
  • 1/2 cup vegetable oil
  • 1 teaspoon vanilla extract
  • 1/2 cup hot coffee Enhances the chocolate flavor.
For the Mousse
  • 1 1/2 cups heavy whipping cream Chill before whipping.
  • 8 ounces semi-sweet chocolate, melted and slightly cooled
  • 2 tablespoons powdered sugar
For the Ganache
  • 6 ounces semi-sweet chocolate, chopped
  • 3/4 cup heavy cream Heat until just steaming.

Method
 

Preparation
  1. Preheat your oven to 350°F. Grease an 8-inch round cake pan and line the bottom with parchment paper.
  2. In a medium bowl, whisk together the flour, cocoa powder, baking soda, and salt.
  3. In a large bowl, whisk the granulated sugar, brown sugar, and eggs until glossy. Add the buttermilk, oil, and vanilla, mixing until smooth.
  4. Slowly pour in the hot coffee, folding gently to incorporate.
  5. Mix the dry ingredients into the wet until just combined, being careful not to overmix.
  6. Pour the batter into the prepared pan and bake for 28 to 35 minutes, until a toothpick comes out with a few moist crumbs.
  7. Allow the cake to cool completely in the pan.
Mousse Preparation
  1. Chill the heavy whipping cream. Whip until soft peaks form, then gently fold in melted chocolate until smooth.
  2. Spread the mousse over the cooled cake. Smooth and refrigerate for at least 2 hours.
Ganache Preparation
  1. Heat the cream until just steaming (do not boil). Pour over the chopped chocolate and let sit for a minute before stirring until smooth.
  2. Pour the ganache over the mousse layer, ensuring a smooth coating. Refrigerate until set.
Serving
  1. Remove the cake from the fridge 10 minutes before slicing. Serve slices cool with optional garnishes.

Notes

Use high-quality semi-sweet chocolate for best flavor. Cool the cake completely before adding mousse.